An official website of the United States government
The .gov means it’s official.
Federal government websites often end in .gov or .mil. Before
sharing sensitive information, make sure you’re on a federal
government site.
The site is secure.
The https:// ensures that you are connecting to the
official website and that any information you provide is encrypted
and transmitted securely.
Márquez E, Lucena MI, Andrade RJ, González-Correa JA, Clavijo E, Lazo MD, Sánchez de la Cuesta F.Márquez E, et al. Among authors: lucena mi.Rev Clin Esp. 1992 Jun;191(2):76-9.Rev Clin Esp. 1992.PMID: 1502393Spanish.